In this section:
Modifying a Media List
Start
- In the WebUI, click the Settings tab.
- In the left navigation pane, go to Media > Media Lists.
- Click the expand ( ) Icon next to the entry you wish to modify.
- Edit the entry properties as required, see details below.
Creating a Media List
Start
Click Create Media List () at the top of the Media List View pane.
Create Media List - SBC 1000/2000
Create Media List - SBC SWe Edge
Media List - Field Definitions
Click '
' on the WebUI screen to configure additional itemsWhen selecting the G729 profile: If your device supports only G729a, then be sure to configure Silence Suppression to Disabled. The G729a codec does not support Silence Suppression.
SBC SWe Edge: The G.722 codec does not support Silence Suppression.
Media List Fields
Field | Description |
---|---|
Description | A name that describes the Media List. Typically, the SIP Signaling Group specifies the Media List for calls that use the Signaling Group. |
Media Profiles List | Specifies a list of Media Profiles for use with this Media List. Codec profile order determines the order in which codecs are specified in SIP message(s) sent to a peer. Consider user preferences when ordering codec profiles, placing the more desirable codecs above the less desirable ones. Use the following options to edit the profile:
|
SDES-SRTP Profile | Specifies the profile for authentication/encryption protocols applied with this Media List. For details about profiles for Source Description RTP packet (SDES) and Secure Real-time Transport Protocol (SRTP), refer to Managing SDES-SRTP Profiles. Note
If you are not using SRTP, set this parameter to None. |
DTLS-SRTP Profile | Specifies the profile for secure communications protocols applied with this Media List. The DTLS-SRTP extension of the Datagram Transport Layer Security (DTLS) protocol negotiates SRTP keying between the SBC 1000/2000 and Microsoft Teams over the UDP media port. Options in the dropdown list are derived from the DTLS-SRTP Profiles configured on the SBC Edge. For details, refer to Working with DTLS-SRTP Profiles. |
Media DSCP | The Differentiated Services Code Point (DSCP) value to assign for all media flows created using this Media List. The default Media DSCP value is 46 and the allowed range is [0..63]. Choose an appropriate DSCP value based on the QoS policies of the IP network traversed by the media packets. |
RTCP Mode | Specifies the mode for carrying statistical and control data for RTP when using this media list:
For more information about RTCP-XR, see RFC 5093. Note
RTCP Mode is not applicable for SBC SWe Edge. |
Dead Call Detection | Specifies whether or not to use RTCP-based Dead Call Detection (DCD). DCD is accomplished by monitoring incoming RTCP packets. If this feature is enabled and no RTCP packets are received from the peer for 30 seconds, the call is considered "dead" and is disconnected. Disable DCD for any peer that does not send RTCP packets. |
Silence Suppression | Specifies whether or not to use Voice Activity Detection and send PT13 packets when on.
|
Enforce SG Codec Priority | Specifies whether or not to force codec priority order as configured in the Media List.
Note
Enforce SG Codec Priority is available for SBC SWe Edge only. |
This field presents a multi-select widget when the Add/Edit button is clicked.
Click here for more information about using the Multi-select widget.
Gain Control - Field Definitions
Set the Gain Control fields to manipulate gain or loss (in decibels) for received and transmitted signals. With Gain Control, the negative values represent signal attenuation (lower volume) and the positive values represent signal amplification (higher volume).
Gain Control fields are not applicable for SBC SWe Edge.
Gain Control Field Definitions
Field | Description |
---|---|
Receive Gain | Specifies the gain or loss in decibels to apply to received signals. (Packet → PCM direction). |
Transmit Gain | Specifies the gain or loss in decibels to apply to transmitted signals (PCM → Packet direction). |
Passthrough/Tone Detection - Field Definitions
Passthrough/Tone Detection Field Definitions
Field | Description |
---|---|
Modem Passthrough | Specifies whether or not modem passthrough is enabled when using the G.711 codec. If you wish to support modem calls, enable this option. When Disabled, the SBC Edge Portfolio does not distinguish between voice and modem calls. When Enabled, and the SBC Edge Portfolio detects a modem call, it switches to Modem Passthrough mode (based on G.711 codec). |
Fax Passthrough | Controls whether or not the SBC Edge Portfolio supports G.711 faxing.
Note
If the fax destination offers only T.38 in the re-INVITE, then the SBC Edge Portfolio must be configured for both G.711 and T.38. As noted above, T.38 fax negotiation is possible whether Fax Passthrough is set to Enabled or Disabled. |
CNG Tone Detection | Specifies whether or not the SBC Edge Portfolio detects Fax tones produced by the origination-side fax machine. CNG tone detection is required when Fax calls are received from TDM for a Fax server, and the voice call needs to be switched to a Fax call using T.38. If CNG Tone Detection is Enabled, the SBC Edge Portfolio detects the Fax tone from TDM and switches to Fax mode (it will initiate a re-INVITE with T.38 support to the Fax Server). If CNG Tone Detection is Disabled, the SBC Edge Portfolio will passthrough the Fax tones to the Fax server and the Fax server must detect the tones and initiate a re-INVITE to switch to Fax mode with T.38. Note
CNG Tone Detection is not applicable for SBC SWe Edge. |
Fax Tone Detection | Warning
Fax tone detection is not supported with the G.729 codec. Specifies whether or not the SBC Edge Portfolio system will detect Fax tones produced by the terminating side fax machine. Fax tone detection (V.21 flags) is used when Fax calls are received from TDM to a Fax server and the voice call needs to be switched to a Fax call using T.38. If Fax Tone Detection is Enabled, the SBC Edge Portfolio detects the Fax tone from TDM and switches to Fax mode (it will initiate a re-INVITE with T.38 support to the Fax Server). If Fax Tone Detection is Disabled, the SBC Edge Portfolio will passthrough the Fax tones to the Fax server and the Fax server will have to detect them and initiate a re-INVITE to switch to Fax mode with T.38. |
DTMF Signal to Noise | Sets the Signal to Noise Ratio that affects DTMF detection. Setting higher Signal-to-Noise ratio values reduces the chance of false detection; however, a setting can be too high for the amount of noise in an audio stream. Use this field to set a value in the range -3 dB to +6 dB. The default value for the field is 0 dBM. Note
DTMF Signal to Noise is not applicable for SBC SWe Edge. |
DTMF Minimum Level | Sets the minimum signal level for DTMF detection; DTMF digits lower than the minimum are not detected. Valid entries: -48 to -14 dBm0. The default value of the field is -38 dBm0. Note
DTMF Minimum Level is not applicable for SBC SWe Edge. |
Digit Relay - Field Definitions
Digit Relay Field Definitions
Field | Description |
---|---|
Digit (DTMF) Relay Type | Specifies how DTMF digits are passed through the data network; as normal voice or encoded as specified in RFC 4733 (RFC 2833). RFC 4733 (RFC 2833): When a DTMF digit is detected in the voice stream coming from the TDM side, the digit is removed from the voice stream (going to the IP network), and is sent out-of-band using the RFC 4733 (RFC 2833) mechanism. As Voice: The DTMF digits are sent in the voice stream without any special treatment. |
Digit Relay Payload Type | Specifies the payload type used for RFC 4733 (RFC 2833) packets. Available only when RFC 4733 (listed as RFC 2833) is specified for Relay Type. |